Free · No Upload · No Sign-up · No Watermarks

Resize Images Instantly — Free, Private & Online

O redimensionador de imagens mais seguro e focado em privacidade. Redimensione JPG, PNG, WebP e GIF inteiramente no seu navegador com HTML5 Canvas. Nenhuma imagem é enviada a servidor algum — suas fotos nunca saem do seu dispositivo, e você pode verificar isso na aba Rede do DevTools do navegador.

100% Private Instant Processing No Watermarks JPG · PNG · WebP · GIF Always Free

Upload an image

Drag & drop your images here

or click to browse · paste with Ctrl+V · multiple files supported

JPG PNG WebP GIF

Popular Social Media Image Sizes

Click any size below to instantly apply it in the editor above.

Instagram

Post (Square) 1080 × 1080 px Portrait Post 1080 × 1350 px Retrato 3:4 1080 × 1440 px Story / Reel 1080 × 1920 px
Full Instagram size guide →

YouTube

Thumbnail 1280 × 720 px Channel Art 2560 × 1440 px Profile Picture 800 × 800 px
Full YouTube size guide →

Facebook

Cover Photo 851 × 315 px Post Image 1200 × 630 px Profile Picture 320 × 320 px
Full Facebook size guide →

Twitter / X

Post Image 1200 × 675 px Header Photo 1500 × 500 px Profile Picture 400 × 400 px
Full Twitter/X size guide →

LinkedIn

Post Image 1200 × 627 px Cover Photo 1584 × 396 px Profile Picture 400 × 400 px
Full LinkedIn size guide →

WhatsApp

Profile Photo 640 × 640 px Shared Image (max) 1600 × 900 px Status Image 1080 × 1920 px
Full WhatsApp size guide →

How to Resize an Image Online

  1. Upload your image

    Drag & drop, click to browse, or paste from clipboard with Ctrl+V.

  2. Set target dimensions

    Enter width & height in pixels, or use the percentage slider. Toggle aspect ratio lock to prevent distortion.

  3. Download your image

    Pick output format (JPG, PNG, WebP), set quality, then click Download — done!

Why Choose Resizo?

100% Private

All processing happens in your browser. Images are never uploaded to any server.

Instant & Fast

No waiting for uploads or server processing. Results appear in milliseconds using the Canvas API.

Bulk Resize

Resize multiple images at once and download them all as a ZIP file in one click.

Quality Control

Fine-tune output quality with a slider. Preview before/after with the built-in comparison tool.

Works on Mobile

Fully responsive, works on any smartphone or tablet — no app installation required.

Format Conversion

Input JPG, PNG, WebP, or GIF. Export as JPG, PNG, or WebP — with full format conversion.

Bulk processing

Work with many images at once

Process hundreds of images in a single run — all in your browser. Download results as a ZIP.

Batch Resize
Bulk resize to any width × height
Batch Convert
JPG · PNG · WEBP with quality control
Batch Crop
Any aspect ratio — 1:1, 16:9, 9:16
Batch Watermark
Text or logo with position + opacity
Batch Rename
Prefix + sequence, zero quality loss
Batch Toolkit
All-in-one hub for every batch tool

More Free Image Tools

Compress PNG
Reduce PNG file size
JPG to WebP
Convert & compress
Instagram
Posts & stories
Foto Passaporte
Passaporte, visto e ID
YouTube
Thumbnails & banners
Facebook
Posts & covers
Twitter / X
Headers & profiles
LinkedIn
Banners & logos
WhatsApp
Profile & status

Standard Image Sizes for Every Platform

Use Resizo to resize your images to the exact pixel dimensions required by each platform.

Instagram
  • Post (Square)1080 × 1080 px
  • Portrait Post1080 × 1350 px
  • Retrato 3:41080 × 1440 px
  • Story / Reel1080 × 1920 px
Full Instagram size guide →
YouTube
  • Thumbnail1280 × 720 px
  • Channel Art2560 × 1440 px
  • Profile Picture800 × 800 px
Full YouTube size guide →
Facebook
  • Cover Photo851 × 315 px
  • Post Image1200 × 630 px
  • Profile Picture320 × 320 px
Full Facebook size guide →
Twitter / X
  • Post Image1200 × 675 px
  • Header Photo1500 × 500 px
  • Profile Picture400 × 400 px
Full Twitter/X size guide →
LinkedIn
  • Post Image1200 × 627 px
  • Cover Photo1584 × 396 px
  • Profile Picture400 × 400 px
Full LinkedIn size guide →
WhatsApp
  • Profile Photo640 × 640 px
  • Shared Image (max)1600 × 900 px
  • Status Image1080 × 1920 px
Full WhatsApp size guide →

From the Blog

View All Articles

Privacy & Security

Batch Tools

Kit gratuito de imagens em lote: redimensionar, converter e comprimir

Guia prático da Resizo para kit gratuito de imagens em lote: redimensionar, converter e comprimir, com passos, erros comuns e fluxo sem upload.

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Compression

Como reduzir o tamanho de uma foto sem piorar a aparência

Guia prático da Resizo para como reduzir o tamanho de uma foto sem piorar a aparência, com passos, erros comuns e fluxo sem upload.

Ler artigo
Resizing

Como redimensionar uma imagem sem perder qualidade

Guia prático da Resizo para como redimensionar uma imagem sem perder qualidade, com passos, erros comuns e fluxo sem upload.

Ler artigo
PNG Compression

Comprimir PNG sem perder qualidade: guia prático

Guia prático da Resizo para comprimir png sem perder qualidade: guia prático, com passos, erros comuns e fluxo sem upload.

Ler artigo
Workflow

A forma mais rápida de redimensionar imagens para web em lote sem upload

Guia prático da Resizo para a forma mais rápida de redimensionar imagens para web em lote sem upload, com passos, erros comuns e fluxo sem upload.

Ler artigo

Social Media

Social Media

Social Media Image Sizes 2026

Complete guide to image sizes for Instagram, YouTube, Facebook, TikTok, LinkedIn & WhatsApp in 2026.

Read article
Instagram

How to Resize Image for Instagram Perfectly

Resize your images for Instagram in seconds. Exact pixel dimensions for posts, stories, reels, and profiles.

Read article
LinkedIn

LinkedIn Profile Picture Size Guide

Get the correct LinkedIn profile picture size. Learn the exact dimensions, how to resize, and keep it looking sharp.

Read article
YouTube

YouTube Thumbnail & Image Sizes

All YouTube image sizes: thumbnail 1280x720, channel art 2560x1440, profile 800x800. Resize free in browser.

Read article

Practical Guides

Guide

How to Resize Image Online Free

Learn how to resize image online free in seconds. Resizo processes images directly in your browser without uploads.

Read article
Email

How to Reduce Image File Size for Email

Reduce image file size before emailing — compress JPG & PNG to under 1MB instantly. No upload needed.

Read article
E-commerce

Resize Product Images for E-commerce

Product image sizes for Shopify, WooCommerce, Amazon, Etsy. Resize product photos free in your browser.

Read article
Formats

JPG vs PNG vs WebP: Which Format to Use?

Compare JPG, PNG and WebP formats — file size, quality, transparency & browser support. Convert for free.

Read article
View All Articles

Frequently Asked Questions

Is Resizo free to use?
Yes, Resizo is completely free. There are no sign-ups, subscriptions, or watermarks — ever.
Is my image uploaded to a server?
No. All image processing happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device.
Does resizing an image reduce its quality?
Resizo uses high-quality bicubic interpolation via the Canvas API to minimise quality loss. You can also control the output quality with the quality slider for JPG and WebP formats.
What image formats does Resizo support?
Resizo supports JPG, PNG, WebP, and GIF as input formats. You can export your resized image as JPG, PNG, or WebP.
Can I resize images on mobile?
Yes. Resizo is fully responsive and works on any modern smartphone or tablet browser — iOS Safari, Android Chrome, and others. No app installation required.
Can I resize multiple images at once?
Yes! You can upload multiple images at once. Apply the same dimensions to all images with "Apply to All", then download everything as a single ZIP file.